5.4 Electric Potential Difference

Which description best describes electric potential difference?

• The amount of energy that a charge has.

• The amount of energy needed to move a charge from 1 place to another.

• The amount of charge that an electron has.

• The amount of brightness you observe when looking at a lightbulb.

Electric potential difference is measured in

• newtons (N)

• amps (A)

• volts (V)

• joules (J)

1 volt is equivalent to

• J/C

• C/J

• A/C

• m/N

A common name for electric potential difference is

• electric energy

• juice

• voltage

• current energy

An 8.2 V battery supplies 6.2 * 10² C of charge to a fan motor. How much energy does the fan use?

• 0.013 J

• 76 J

• 1693 J

• 5084 J

Your speaker has 70 V uses 817 J of energy to play sound. How much charge does your speaker use?

• 2 C

• 7 C

• 12 C

• 29 C

Your flashlight spends 6138 J of energy to illuminate an area for 3.2 min. If a current of 2.8 A was used to power the flashlight, what was the flashlight's voltage?

• 11 V

• 20 V

• 47 V

• 685 V

How long would it take for a 240 V stove, running a current of 42 A, to produce 8.4 * 10⁷ J of heat energy?

• 7 min

• 82 min

• 139 min

• 275 min